Moving up the yield curve :  advances and obstacles : proceedings of a symposium/ 
sponsored by Divisions S-4, S-8, and A-4 of the American Society of Agronomy and the Soil Science Society of America ; organizing committee, Lloyd Hossner, Robert Hoeft ; editor-in-chife, Matthias Stelly ; assistant editor, Mary P. Wirtz. 
 - Madison, Wis. :  ASA:  Soil Science Society of America,  1980. 
 - vii, 103 p. :  ill. ;  23 cm. 
 - ASA special publication ;  no. 39 .
<br/><br/> Presented during the annual meeting in Chicago, Illinois, 3-8 December 1978. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0891180648 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crop yields--Congresses.<br/>Agronomy--Congresses.
<br/><br/><label>LC Class. No.: </label>SB16  / M69 1980